Electric water-alarm.



PATENTED JAN. 29, 19.07.

A. JOHNSON. ELECTRIC WATER ALARM. APPLICATION FILED MAB. 20 1906 INVENTOI? ATTORNEY UNITED srarns PATENT orrion ALBERT JOHNSON, YOF'N'EWI YORK, N. Y;

ELECTRIC WA ER-ALARM.

Specification of Letters Patent. Application-filed March 20,19oa 'semlm. 506,969.

PatentedJan. 29, 1907.

To all when-1 it may eon/007711;".

- Be it known that 'L'ALBERT JOHNSON, a subject of the Kin of Sweden, and a resident of the borough of Manhattan, city of New York, in the county and State of.New York,

have invented certain new and useful Improvements in 'Electric Water -Alarms, of which the following, takenin connection with the accompanying drawings, is a' full, clear, and exact specification.

My invention relates to automatic electric alarms applicable, in connectionwith tanks or reservoirs of any description for containing water or other liquid, to give notice of the rise or fall -of liqu1d1beyond certain predetermined :points and ,to-indicate that the supply'should be checked or renewed, accor ing to the particular circumstance. The'object of my invention is principally to provide or produce areliable and efficient mechanism for establishingelectric connec- ,"tion for producing an'alarm upon the rise or fall. of water in asupply-tank orreservoir ofany character, whic mechanism' shall be simple of construction, easy to apply, and

not liable to et out o'forder.

To accomplish the foregoing obj ect'and to secureother and further advantages in the Y as is ordinarily, employed upon roofs and .in

- pointed out in the claims,

matters of construction, operation, applica-' tion, and use, my-improvements' involve certain new and useful arrangements or combinations of parts and principles of operation, as will beherein first fully described and then In the accompanying drawings, forming part of'this specification, Figure 1 is a' sec,' tional elevation showing my improved meehanism in place upon an ordinaryjwater-tank; Fig. 2 is ajtop :or Ian view representing the bed-plate of my evice, the s'ring and .the, contact-arms mounted in'place "on the late,

this figure being on a larger scale than ig. I. Fig. 3 is a corresponding side elevation with v portions shown in section.

In all th figures like'letters of reference wherever they occur indicate corresponding P rts. I t

. A'represents one form of water-tank, such other situations to afford a supply' of'water,

for household and other uses; but it should be understood that the improved, device may be employed in connection-with anyiexposed re mole form-er r -ther'.1iqui d for in con. neCtiQn r I p anon-conducting plated of suitable plate be made for leading the connectingmateriahasat kand Z;-but other means of size and shape for. sustaining the operat' parts, the plate being intended to be secure in place, as by screws a (1, upon the top A of the tank or upon any other convenient place of su port. --By preference I I mount; the g directly above the body of the liquid and near the center or side of, the top of the receptacle; but obviously itlnight be' mount-' ed in any other position if proper rovision e'from.

the floats to the spring. i y

C is a bent spring, of which one end is secured-upon plate B,-as :by screws b 6, it's op'- posite'end being capable of movement between two arms, one-extendingover and the other beneath the spring. These arms are represented, respectively, at D and E, the former having a downturned ends for makv inga fair contact with the spring and the 7 other having an upturned end d for a similar purpose. Two separate floats, as F- and G, are connected with-the movable end of spring C, and they are located in the liquid-receptacle and rise and fall with the, liquid,'-bing properly ballasted by the introduction of any'suitable liquid or other substance, as represented at e and a The upper float F is connected with 'th'espring by a chain or equivalent means, (represented at H,) and preferablythis is ap-; plied by use of an eyebolt g, having suitable nuts 'h and i, the bolt-beinginsulated from: I

tendedftovrest upon the 'ottom,6f -1th *re cep-. tacle and of gravity sufficient to resistpthe buoyant efio'rt of :the" twogfloat'slcombinem but obviously thisweight mightjbe-ll'lep by any. suitable-means of anchoring-t end of chain L. I The chain l be two floats'is of length sufiicient upper float to be carried up the receptacle to the predetermined highest levelof the-liquid, and whenj is thus .'c ar-. ried up thelendioffthe spring'CjriSes andmakes the {desired contact-with thejarm D.

roof "i liquid in a Spring O is of sufficient powerto sustain the weight of float F (and chains Hand I) When the liquid falls below its highest level in the receptacle; but it is not of sutlicient power to sustain the combined weight of the two floats. When the liquid recedes beyond the limit of its lowest predetermined level in the receptacle, the weight or" the lower float is added to that of the upper one, and then )4 the two together pullthe cnd-ot the spring down, causing contact with the arm E. The required lengths of-the chains and the tension or power of the spring for any required conditions are matters which are easily regulated.

, either-one forms part of -the circuit,with conductorN, spring O, "and arm D or E included. The arms D and E are preferably secured upon the bed-plate by screws, as n n and 0 0,

one-of each pair forming a convenient bindingpost for-'theconductor O or P.

Theparts being constructed and arranged substantially as above explained and beingin place for use, when the liquidrises to its upper limit the electric circuit will be aut0- matically closed through arm D, and when it falls to-its lowest limit the circuit willbe closed through arm E, and thus the alarm given under either circumstance. The "How of liquid'to the receptacle may then be arrested or renewed, as required. As long as the height of liquid in the receptacle remains between its extreme limits the spring Cwill remain free from contact with either armD or E, and thus the circuit allowed to remain open. i

The improved device is found to be simple and easy of construction and application, reliable in operation, and to fulfil all the purposes or objects ofthe invention her'einbelore alluded to.

Having now fully described my invention, what I tlaim'as .ncw herein, and'desire to secure by Letters Patent, is

1. In a device of the character herein set forth, the combination with a spring and arms for contact therewith, of two floats applied in (onnectionwith said spring and adapted to permit the end thereof to rise and compel it to descend, substantially as and for the purposes setl orth.

2. In a device of the characterherein set forth, the ombinationwith aspring and arms for contact therewith, of two floats connected with each other, one of said floats being connected with the end of the spring,

substantially as explained and for'thepurposes set forth. 4

In a device of the character herein set forth, the combination with the spring and arms for=contact therewith, of two floats connected with each other and with the spring, and 'an anchor applied in connection with the-lowerfloat, substantially as and forthe purposes set forth.

In testimony whereof I havesigned my name-to this specification in the presence of two subscribing witnesses. I

, ALBER'I JOHNSON.

Witnesses:

C. SEDGWICK',

' J. M. HOWARD. 

